Epoxy-Based Hybrid Formulations: Properties and Durability Performance
5. Patent
Some of the systems presented in the paper were developed in the framework of the patent:
F. Lionetto, M. Frigione “Organic-inorganic hybrids polymerized in situ at room temperature”, EP2977407 A1.
Author Contributions:Conceptualization, M.F.; methodology, M.L. and F.L.; investigation and formal analysis, M.L. and F.L.; data curation, M.L. and F.L.; writing—original draft preparation, M.F.; review and editing, L.M.;
supervision, M.F.; projects administration, M.F.; funding acquisition, M.F. All authors have read and agreed to the published version of the manuscript.
Funding:This research was partly funded by PON 2007–2013 “IT@CHA—Italian Technologies for Advanced Applications in Cultural Heritage Assets” and by Apulia Regional projects “Applied Innovation Technologies for Diagnosis and Conservation of Built Heritage—A.I.Te.C.H.” and “Protezione, consolidamento e pulitura di materiali lapidei caratteristici della Regione Puglia: Sperimentazione di prodotti a basso impatto ambientale e monitoraggio dei trattamenti”.
Acknowledgments:The authors wish to thank: Maurizio Masieri for his technical support in performing the ESEM-EDS analyses on the BSi and BSiMo samples; and Luca Prezzi and SAFE Marine Nanotechnologies, Ferentino (FR), Italy for supplying some of the experimented materials (BSi and BSiMo set).
Conflicts of Interest:The authors declare no conflict of interest.
References
1. Zaferani, S.H. Introduction of polymer-based nanocomposites. InPolymer-based Nanocomposites for Energy and Environmental Applications; Jawaid, M., Khan, M.M., Eds.; Woodhead Publishing: Cambridge, UK, 2018;
pp. 1–25.
2. Mascia, L.; Tang, T. Curing and morphology of epoxy resin-silica hybrids.J. Mater. Chem.1998,8, 2417–2421.
[CrossRef]
3. Jojibabu, P.; Zhang, Y.X.; Prusty, B.G. A review of research advances in epoxy-based nanocomposites as adhesive materials.Int. J. Adhes. Adhes.2020,96, 102454. [CrossRef]
4. Karbhari, V.M. Building materials for the renewal of civil infrastructure. Reinf. Plast. 2005,49, 14–25.
[CrossRef]
5. Budhe, S.; Banea, M.D.; de Barros, S. Bonded repair of composite structures in aerospace application: A review on environmental issues.Appl. Adhes. Sci.2018,6, 3. [CrossRef]
185
6. Karbhari, V.M.; Ghosh, K. Comparative durability evaluation of ambient temperature cured externally bonded CFRP and GFRP composite systems for repair of bridges. Compos. Part A Appl. Sci. Manuf.
2009,40, 1353–1363. [CrossRef]
7. Tatar, J.; Hamilton, H.R. Comparison of laboratory and field environmental conditioning on FRP-concrete bond durability.Constr. Build. Mater.2016,122, 525–536. [CrossRef]
8. Silva, P.; Fernandes, P.; Sena-Cruz, J.; Xavier, J.; Castro, F.; Soares, D.; Carneiro, V. Effects of different environmental conditions on the mechanical characteristics of a structural epoxy. Compos. Part B-Eng.
2016,88, 55–63. [CrossRef]
9. Frigione, M. Durability problems of concrete structures rehabilitated with FRP. InEco-Efficient Repair and Rehabilitation of Concrete Infrastructures; Pacheco-Torgal, F., Melchers, R.E., Shi, X., Belie, N.D., Tittelboom, K.V., Sáez, A., Eds.; Woodhead Publishing: Cambridge, UK, 2018; pp. 147–170.
10. Proia, A.; Matthys, S. Influence of environmental conditions on the glass transition temperature of epoxy used for strengthening applications.Polym. Test.2019,79, 106012. [CrossRef]
11. Pethrick, R.A. Design and ageing of adhesives for structural adhesive bonding–a review.Proc. Inst. Mech.
Eng. Part L: J. Mater. Des. Appl.2015,229, 349–379. [CrossRef]
12. Morshed, S.A.; Young, T.J.; Chirdon, W.M.; Zhang, Q.; Tatar, J. Durability of wet lay-up FRP bonded to concrete with nanomodified epoxy adhesives.J. Adhes.2018, 1–26. [CrossRef]
13. Saloma; Nasution, A.; Imran, I.; Abdullah, M. Improvement of Concrete Durability by Nanomaterials.
Procedia Eng.2015,125, 608–612. [CrossRef]
14. Rattan, A.; Sachdeva, P.; Chaudhary, A. Use of Nanomaterials in Concrete.Int. J. Latest Res. Eng. Technol.
2016,2, 81–84.
15. Norhasri, M.S.M.; Hamidah, M.S.; Fadzil, A.M. Applications of using nanomaterial in concrete: A review.
Constr. Build. Mater.2017,133, 91–97. [CrossRef]
16. Xenopoulos, C.; Mascia, L.; Shaw, S.J. Variables analysis in the gelation of alkoxysilane solutions for the production of polyimide-silica hybrids.Mater. Sci. Eng. C1998,6, 99–114. [CrossRef]
17. Mascia, L.; Prezzi, L.; Haworth, B. Substantiating the role of phase bicontinuity and interfacial bonding in epoxy-silica nanocomposites.J. Mater. Sci.2006,41, 1145–1155. [CrossRef]
18. Mitra, J.; Ghosh, M.; Bordia, R.K.; Sharma, A. Photoluminescent electrospun submicron fibers of hybrid organosiloxane and derived silica.RSC Adv.2013,3, 7591. [CrossRef]
19. Piscitelli, F.; Buonocore, G.G.; Lavorgna, M.; Verdolotti, L.; Pricl, S.; Gentile, G.; Mascia, L. Peculiarities in the structure-Properties relationship of epoxy-silica hybrids with highly organic siloxane domains.Polymer 2015,63, 222–229. [CrossRef]
20. Liu, B.; Wang, H.; Guo, X.; Yang, R.; Li, X. Effects of an Organic-Inorganic Hybrid Containing Allyl Benzoxazine and POSS on Thermal Properties and Flame Retardancy of Epoxy Resin.Polymers2019,11, 770.
[CrossRef]
21. Lettieri, M.; Lionetto, F.; Frigione, M.; Prezzi, L.; Mascia, L. Cold-cured epoxy-silica hybrids: Effects of large variation in specimen thickness on the evolution of theTgand related properties.Polym. Eng. Sci.
2011,51, 358–368. [CrossRef]
22. Lionetto, F.; Mascia, L.; Frigione, M. Evolution of transient states and properties of an epoxy–silica hybrid cured at ambient temperature.Eur. Polym. J.2013,49, 1298–1313. [CrossRef]
23. Lionetto, F.; Timo, A.; Frigione, M. Cold-Cured Epoxy-Based Organic–Inorganic Hybrid Resins Containing Deep Eutectic Solvents.Polymers2019,11, 14. [CrossRef] [PubMed]
24. Prezzi, L.; Mascia, L. Network density control in epoxy–silica hybrids by selective silane functionalization of precursors.Adv. Polym. Technol.2005,24, 91–102. [CrossRef]
25. Lionetto, F.; Frigione, M. Organic-inorganic Hybrids Polymerized in Situ at Room Temperature. EP 2977407 A1, 20 July 2015.
26. Vanlandingham, M.R.; Eduljee, R.F.; Gillespie, J.W., Jr. Relationships between stoichiometry, microstructure, and properties for amine-cured epoxies.Journal of Applied Polymer Science1999,71, 699–712. [CrossRef]
27. Prezzi, L. Epoxy–silica hybrids for coating applications. Ph.D. Thesis, Loughborough University, Department of Materials, Loughborough, UK, 2003.
28. Mascia, L.; Prezzi, L.; Wilcox, G.D.; Lavorgna, M. Molybdate doping of networks in epoxy–silica hybrids:
Domain structuring and corrosion inhibition.Prog. Organ. Coat.2006,56, 13–22. [CrossRef]
Polymers2020,12, 476
29. Chru´sciel, J.J.; Le´sniak, E. Modification of epoxy resins with functional silanes, polysiloxanes, silsesquioxanes, silica and silicates.Progr. Polym. Sci.2015,41, 67–121. [CrossRef]
30. Balgude, D.; Sabnis, A. Sol–gel derived hybrid coatings as an environment friendly surface treatment for corrosion protection of metals and their alloys.J. Sol-Gel Sci. Technol.2012,64, 124–134. [CrossRef]
31. Figueira, R.B.; Silva, C.J.R.; Pereira, E.V. Organic–inorganic hybrid sol–gel coatings for metal corrosion protection: A review of recent progress.J. Coat. Technol. Res.2015,12, 1–35. [CrossRef]
32. Yasakau, K.A.; Ferreira, M.G.S.; Zheludkevich, M.L. Sol-Gel Coatings with Nanocontainers of Corrosion Inhibitors for Active Corrosion Protection of Metallic Materials. InHandbook of Sol-Gel Science and Technology;
Klein, L., Aparicio, M., Jitianu, A., Eds.; Springer International Publishing: Cham, Switzerland, 2017; pp. 1–37.
ISBN 978-3-319-19454-7.
33. Eduok, U.; Szpunar, J. Ultrasound-assisted synthesis of zinc molybdate nanocrystals and molybdate-doped epoxy/PDMS nanocomposite coatings for Mg alloy protection. Ultrason. Sonochem. 2018,44, 288–298.
[CrossRef]
34. ASTM D790-03 Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials; ASTM International: West Conshohocken, PA, USA, 2003.
35. Aiello, M.A.; Frigione, M.; Acierno, D. Effects of environmental conditions on performance of polymeric adhesives for restoration of concrete structures.J. Mater. Civ. Eng.2002,14, 185–189. [CrossRef]
36. Loureiro, M.V.; Ciriminna, R.; Lourenço, M.J.; Santos, L.F.; De Schrijver, A.; Bordado, J.C.; Pagliaro, M.;
Marques, A.C. Organically-modified silica based microspheres for self-curing polyurethane one component foams.Microporous Mesoporous Mater.2017,244, 244–250. [CrossRef]
37. Moussa, O.; Vassilopoulos, A.P.; de Castro, J.; Keller, T. Early-age tensile properties of structural epoxy adhesives subjected to low-temperature curing.Int. J. Adhes. Adhes.2012,35, 9–16. [CrossRef]
38. Frigione, M.; Naddeo, C.; Acierno, D. Cold-Curing Epoxy Resins: Aging and Environmental Effects.
I-Thermal Properties.J. Polym. Eng.2001,21, 23–51. [CrossRef]
39. Frigione, M.; Lettieri, M.; Mecchi, A.M. Environmental effects on epoxy adhesives employed for restoration of historical buildings.J. Mater. Civ. Eng.2006,18, 715–722. [CrossRef]
40. Mat˘ejka, L.; Dukh, O.; Kolaˇrík, J. Reinforcement of crosslinked rubbery epoxies by in-situ formed silica.
Polymer2000,41, 1449–1459. [CrossRef]
41. Kaushik, A.; Kaushik, J. Solvent Absorption Characteristics of Epoxy-Colloidal Silica Nanocomposites.
J. Reinf. Plast. Comp.2010,29, 2821–2833. [CrossRef]
42. Mascia, L.Polymers in industry from A to Z: A concise encyclopedia; John Wiley & Sons: Hoboken, NJ, USA, 2012.
43. Savvilotidou, M.; Vassilopoulos, A.P.; Frigione, M.; Keller, T. Development of physical and mechanical properties of a cold-curing structural adhesive in a wet bridge environment. Constr. Build. Mater.
2017,144, 115–124. [CrossRef]
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